The founder of Sri Sucharitadhara Upasika Samiti K. D. P. Fonseka Mahopasika addressed Sri. Sri Sanghamitta Dhamma School, which was founded on the 12th of February 2465 (1921) under the guidance of His Holiness Kodagoda Sri Panjananda Anunayake, who was the ruler of Pamankada Sri Maha Vihara at that time, is now (2023) 102 years old. This is a solemn Sunday school in the early days of the beginning of Sunday schools in Sri Lanka and now belongs to the Dehiwala Regional Education Security Force. Currently, nearly 250 children are receiving Dhamma education and 18 teachers are working in the faculty.

In the early days, this was run as a Buddhist seminary on Saturdays. There were 10 classes at the time of opening, which consisted of the Buddhist Dharmacharya exam class, classes 1-7, baby class and kindergarten class. In the year 1933, it has also been able to win the certificate for the Sunday school which obtained the best results among the Buddhist schools in Sri Lanka. In the early period, K. D. P. Fonseka held the position of headmaster of the Dhamma School and after her death the position of headmaster was held by Professor, Pandita Kotagama Vacchissara Maha Thero. Although he led an extremely busy life as the dean of the university and traveling to various parts of Sri Lanka to preach, his eager participation in the activities of the Sunday school is the best illustration to understand the care he had for the Sunday school. Dr. E. W. Mr. Fonseka also acted as a leader of the Sunday School and his service to the children is always memorable in the history of Sanghamitta Sunday School. The community of students born in that period by the Dhamma School have held various high positions in public and private institutions in Sri Lanka, and they remember the past with great respect.

After the sudden demise of Dr. Fonseka and Professor, Pandita Kotagama Vachissara Thero, there were various difficulties in the progress of the Dhamma School, but with the support of Mrs. Indrani Fonseka, Rev. Pamankada Buddhaseeha Nayaka Thero worked for the further development of the Dhamma School. After him, two or three monks who were residents of Pamankada Temple worked for the development of the Sunday school and Dr. W. Ariyadasa Fonseka, Francis Chandrasena, Mano Ranjan Wijebahu, J. it. Chandrasena, J. it. Chandrasiri, Ass. The contribution of gentlemen like Srinath Mendis, Gamini Jayawardena, Rohini Wasantha Fonseka for the continuation of the Sunday School is an indelible mark in the history of the Sunday School.

From the year 1984 to 2019, the post of Principal was held by Hawpe Sri Somananda Nayaka Therodra. He also held the position of the Chairman of the Dehiwala Regional Education Protection Board and contributed to the activities of the Sunday School.

After his passing away, the present Pamankada Sri Maha Viharadhipati Aggamahapandita, Dr. Walpola Piyananda Nayaka Theo, is the headmaster, Royal pandit, Master Walpola Siri Piyarathana Thero. The Sunday school, which had been lagging behind for the past decade and a half, is being given new light by young energy and is being given leadership to turn it into a bright Sunday school in the area, and the great support given by the teaching staff in a very harmonious way has led to the development of the Sunday School. Who is a bright adishishal and an adigiru J.Bhavat of Dhamma school, currently residing in the United States of America. it. Mr. L. Chandrasiri  Senior Superintendent of Police. it. The contribution of Mr. Perera, and Mr. Varuna Ruwanpathirana, Mr. Kanishka Sugathadasa has also greatly contributed to the development of the Dhamma School.